Handsaw



Jan. 15, 1929.

J. GIBSON HANDSAW Filed May 21,' 1926 Patented Jan. 15 1929.

UNITED "STATES PATENT OFFICE.

' JOSEPH GIBSON, F WHITTLESEA, VICTORIA, AUSTRALIA.

HANDSAW.

Application filed May 21, 1926, Serial No. 110,639, and in Australia October 6, 1925.

The object of the invention is to provide improvements in the blade and handle of a cross-cut or other hand saw, whereby the handle may be conveniently attached to and removed from the blade, and whereby, when the handle is attached, the connection between it and the blade is rigid and prevents liability of accidental looseness.

Of the accompanying drawings forming a part of this specification,

Figure 1 is a fragmentary perspective view, showing portions of a hand saw embodying the invention.

Figure 2 shows in perspective the shank and clamp shown by Figure 1, without the blade.

Figure 3 shows in perspective the shank without the clamp.

Figure 4 shows in perspective an end portion of the blade.

Figure 5 shows in perspective the head and bolt portions of the clamp.

Figure 6 shows in perspective the resilient gripping plate, constituting an element of the clamp shown by Figures 1 and 2.

Figure 7 is a section on the plane indicated by line 77 of Figure 1.

The same reference characters indicate the same parts in all of the figures.

In the drawings, 1 designates an end portion of a hand-saw blade, which is cut away to form an open recess 2 (Figure 4), extending crosswise of the blade between the longitudinal edges thereof, opposed blade shoulders 3 and 4, at opposite ends of the recess, a, slot 5 extending from the recess lengthwise of the blade and spaced from the shoulders 3 and 4, as shown by Figure 4, and studreceiving orifices 6 and 6 adjacent the opposite edges of the slot 5.

The saw handle comprises a shank com posed of a sheet metal strip which includes a socket 8, formed by the midlength portion of the strip and adapted to receive a hand grip 70, and ears formed by the end portions of the strip. The outer portions of the ears form spaced apart flexible jaws 11, 11, having coinciding bolt-receiving orifices 14, 14, and coinciding stud-receiving orifices 12, 12 and 13, 13, at opposite sides of the orifices 14.

The portions 9, 9 of the ears between the socket 8 and the jaws 11 are abutted together and rigidly connected by rivets 10, the edges of these portions being adapted to abut the blade shoulders 3 and 4, as indicated by Figure 1.

The saw handle comprises also a clamp which includes a clamping head 18, bearing on one of the jaws 11, a screw-threaded bolt 17, fixed to and projecting from the center of the head, and extending through the slot 5 of the blade and the orifices 14 of the jaws, and studs 15, 15 projecting from the head at opposite sides of the bolt and entering the stud-receiving orifices 12 and 13 of the jaws and the stud-receiving orifices 6 and 6 of the blade. The bolt 17 may have an enlargement 16, at its inner end (Figure 5).

The clamp includes also a clamping nut 20, engaged with the bolt 17 and arranged to exert pressure on the jaw 11, opposite that on which the head 18 bears. The arrangement is such that when the nut 20 is tightened, the blade is confined against swinging movements on the bolt, by the bearing of the blade shoulders 3 and 4 on the edges of the shank portions 9, and by the entrance of the studs 15 in the stud-receiving orifices 6 and 6 of the blade, and the stud-receiving orifices 12 and 18 of the jaws.

To distribute the pressure exerted by the nut, I provide a curved resilient grippin plate 19, interposed between the nut 20 and the jaw adjacent thereto, and hearing at its central portion on the nut, and at its end portions on the aw, as shown by Figure 7.

I claim:

A hand saw comprising a blade having an end portion cut away to form an open recess extending crosswise of the blade, between the longitudinal edges thereof, opposed blade shoulders at opposite ends of the recess, a slot extending from the recess lengthwise of the blade, and spaced from said shoulders, and stud-receiving orifices adjacent the opposite edges of the slot; a shank composed of a metal strip including a hand grip socket formed by the midlength portion of the strip, and ears formed by the end portions of the strip, the outer portion of the ears forming spaced apart flexible jaws having coinciding bolt-receiving orifices, and coinciding studreceiving orifices at opposite sides of the boltreceiving orifices, the portions of the ears between the socket and the jaws being rigidly connected and adapted to abut the blade shoulders; and a clamp including a clamping head bearing on one of the jaws, a screwthreaded bolt projecting from the center of the head and extending through the slot and the bolt-receiving orifices in the blade end, and studs projecting from the head at opposite sides of the bolt and entering the studing of the bladeshoulders on the shank, and receiving orifices in the jaws and blade, and by the entrance of the studs in the studa clamping nut engaged With the bolt and receiving orifices of the blade and jaws. 10 arranged to exert pressure on the other jaw, In testimony whereof I have signed my the arrangement being such that When the name to this specification.

nut is tightened, the blade is confined against 7 swinging movements on the bolt by the bear- JOSEPH GIBSON. 

